Sash-lock.



10.840,758. -PATBNTED JAN. 8,1902.

0.`L.DURPL1NGBR. y vsAsH LOOK.

AFPLIATION FILED MYZS, 1906.

OLIVER L. DURFLINGER, OF INDIANAPOLIS, INDIANA.

sAsH-LOQK.

Speccation of Letters Patent.

Patented Jan. s, 1907.

Application led May 28, 1906;- Serial No. 319,026.

1o which the upper and lower sashes of a window may be locked or securedat any desired point both with relation to each other and tol the frameor opening in which they are placed.

I Referring to the accompanying drawings,

which are made a part hereof, and on which similar reference charactersindicate similar parts, Figure 1 is a perspective view of a portion of awindow, the sashes being equipped zo with my improved sash-lock; Fig. 2,a plan sectional view at the point indicated by the dotted line 2 2 inFig. 1, showing the lock itself in plan; Fig. 3, ra view similar to Fig.2 with the top portion of the shell or casing re- 2 5 moved and by meansof dotted lines also showing the locking-bolts and operating devices intheir retracted position; and Figs, 4 and 5, sectional views as seenwhen looking in the direction indicated by the arrows from 3o the dottedlines 4 4 and 5 5, respectively, in

Figs. 2 and 3.

The window-frame 21 and sashes 23 and 24 are or may be of the usual formand construction except that the frame and upper sash 3 5 are providedwith perforated locking-strips 22 and 25, respectively. As is common,the sashes are carried in the frame upon cords 26, which "run overpulleys 27 to ordinary window-weights. (Not shown.) l

My improved sash-lock consists of a body or casing composed of a bottom31, a top 32, and a side strip or rim 33. At its inner end it isrecessed or cut away to accommodate the parting-strip andthe sash-cord,as shown.

In use this structure is strongly secured to the top side of the lowersash 23 at a point close to the frame and adjacent sash, as by screws28. It contains two locking-bolts 34 and 35, one of which is adapted toenter mor- 5o tise-like holes in the strip 25 on the upper4 sash and theother of which is adapted to enter corresponding holes in the strip 22on the window frame.l These locking bolts are mounted on studs 41 and42, carried by an 5 5 operating-lever 43, which in turn is mounted on apivot 44, carried by the body of the lock.

These bolts are normally held into engagement (or locked position) bymeans of a spring 45 and are adapted to be retracted by suitablepressure on the handle of the lever. They are held against accidentalwithdrawal from engaged position by means of a catch or detent 51, whichis mounted in the side of the frame or casing and extends over the leverand engages therewith, thus holding it from movement until saidcatchforkdetent is raised and the lever thus released. The detent 51 isprovided' upon its'popposite edges with a pair of notches which extendtoward each other, thus narrowing the detent at one point, as clearlyshown in Fig. 3, and this narrowed portion of the detent lies in ashallow depression formed in the upper edge of the wall of the casing,while the adj acentportions ofthe wall of the casing-opening arereceived in the notches of the detent, thus holding the detent inposition. and forming a pivotal support therefor, the notches in theedges of the-detent being slightlywider than the thickness of the wallof the casing. This detent is held down into engagement by a spring 52,as shown in Fig. 5. As the top and bottom ofthe casing are securedtogether by a screw which passes down through the body of the lever,(which is in the form of a flat plate,) a segmental slot is providedtherein in order that the lever. may have its proper movement about saidscrew.

j I-Iaving thus fully described my said invention, what I claim as new,and desire to secure by Letters Patent, is-

1. A sash-lock comprising a suitable inclosing casing, al pair ofsliding bolts mounted therein and projectable therefrom along linessubstantially at right angles to each other., a plate 43 pivotallymounted within the casing and provided with portions projecting adjacentthe sliding bolts, a connection between said projections and each boltwhereby the bolts may be positively reciprocated by oscillation of theplate, an operating-handle carried by said plate and projecting from thecasing, a spring mounted within the casing and normally urging the boltsand plate to one extreme of position, and a catch member pivotallymounted within the casing and adapted to engage the plate to hold thesame against movement in one direction.

2. A sash-lock comprising a suitable inclosing casing, a pair of slidinbolts mounted therein and proj ectable there om along linessubstantially at iight angles to each other, a

IOO

plate 43 pivotally mounted Within the casing and provided with portionsprojecting adj a- 'ranged notches in its edges, said strip lying 'Withina notch formed in the side Wall ofthe casing, the notches in the stripreceiving the saidside Wall, said strip having at its inner 15 end aportion adapted to engage the pivoted plate, substantially as and forthe purpose set forth.

In Witness whereof I have hereunto set my hand and seal, atIndianapolis, Indiana, this 2o 26th day of May, A. D. 1906.

OLIVER L. DURFLINGER.

Witnesses: y

CHESTER BRADFORD, THOMAS W. McMRANs.

